Windows using ANT+ everything works well, but when I try to calibrate I enter 2133 for circumference and enter but the value always remains 175. Of course, that circumference of 175 will not let me calibrate the unit. What am I doing wrong?

OK. But when I try to do the calibration with the value at 175, no matter how fast I pedal, it tells me to increase speed. In short, I cannot calibrate. This is with 50/12 and rpm above 120. How can i calibrate the unit?

Are you first warming up the Direto by pedaling for ~10 minutes? While the Direto does not require a spin up or spin down calibration on every use like other trainers, I found that it would not let me calibrate directly out of the box and I received the same pedal faster messages when trying to calibrate. My recommendation - power on the trainer, start pedaling for about 10 minutes, then launch the calibration from the app or desktop and it should calibrate in a few seconds.

Thanks for the reply.I did warm up for 10 minutes. Oddly, I found that it will calibrate when using bluetooth with my iPhone, but not with Windows and Ant+.I much prefer Windows with a larger screen.I will warm up for 10 minutes and try again on the Windows app.So, if I can calibrate with ios app (via bluetooth) does that also mean I am calibrated on windows with Ant+?

So it turns out that calibrating Direto with the ios app also calibrates it for other apps.And BTW for the Elite admins, it calibrated fine with the ios app with wheel size set to 700C 25mm (2133) not the 175 that the Windows app kept forcing.